STMicroelectronics TDA7376B Schematic [ru]
2 x 35W POWER AMPLIFIER FOR CAR RADIO
HIGHOUTPUTPOWERCAPABILITY:
2 x40W max./4
2 x35W/4ΩEIAJ
2 x25W4Ω @ 14.4V,1KHz, 10%
DIFFERENTIAL INPUTS
MINIMUMEXTERNALCOMPONENT COUNT
INTERNALLYFIXED GAIN (26dB)
MUTEFUNCTION (CMOS COMPATIBLE)
AUTOMUTE AT MINIMUM SUPPLY VOLT-
AGE DETECTION
STAND-BY FUNCTION
NO AUDIBLE POP DURING MUTE AND ST-
BY OPERATIONS
CLIPPING DETECTOR WITH PROGRAMMA-
BLE DISTORTIONTHRESHOLD
PROTECTIONS:
SHORT CIRCUIT (OUT TO GROUND, OUT
TO SUPPLY VOLTAGE, ACROSS THE
LOAD)
OVERRATING CHIP TEMPERATURE WITH
SOFT THERMALLIMITER
LOADDUMP VOLTAGE
FORTUITOUS OPEN GROUND
LOUDSPEAKERDC CURRENT
ESD
Ω
TDA7376B
MULTIWATT15
ORDERING NUMBER: TDA7376B
DESCRIPTION
The TDA7376B is a new technology dual bridge
Audio Amplifier in Multiwatt 15 package designed
for car radioapplications. Thanksto thefully complementary PNP/NPN output stage configuration
the TDA7376Bdelivers a rail-to-rail voltage swing
with no need of bootstrap capacitors. Differential
input pairs, that will accept either single ended or
differentialinput signals, guarantee high noise immunity making thedevice suitablefor both car radio and carboosters applications.
The audio mute control, that attenuates the output signal of theaudio amplifiers, suppresses pop
on - off transients and cuts any noises coming
from previous stages. The St-By control, that debiases the amplifiers, reduces the cost of the
powerswitch. The on-boardprogrammable distortion detector allows compression facility whenever the ampifier is overdriven,so limiting the distortion at anylevels inside the presettablerange.
PIN CONNECTION
September 1998
This is advancedinformation on anew product now in development or undergoingevaluation.Details are subject to change withoutnotice.
(Continued)
1/9
TDA7376B
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
OP
V
S
V
peak
I
O
P
tot
T
stg,Tj
Operating Supply Voltage 18 V
DC Supply Voltage 28 V
Peak Supply Voltage (t= 50ms) 50 V
Output Peak Current(non rep. t = 100µs)
Output Peak Current(rep. f > 10Hz)
Power Dissipation at T
=85°C36W
case
4.5
3.5
Storage and Junction Temperature –40 to150 °C
THERMAL DATA
Symbol Parameter Value Unit
Thermal ResistanceJunction-case max. 1.8
2/9
R
th j-case
C/W
°
A
A
Figure 1: DifferentialInputsTest and ApplicationCircuit
1µF
TDA7376B
Figure 2: SingleEnded Inputs Test and ApplicationCircuit
1µF
3/9
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